Stripping apparatus for carding machines and the like



A. SMITH.

STRIPPING APPARATUS FOR CARDING MACHINES AND THE LIKE. I

APPLICATION FILED MAY 7, I920- A Patented Aug. 1, 1922.-

ALFRED SMITH, OF LA MADELEINE-LEZ-LILLE, FRANCE.

STRIPPING APPARATUS FOR CARDING MACHINES AND THE LIKE.

Application filed May 7, 1920.

To all whom it may concern:

Be it known that I, ALFRED SMITH, a subject of the King of GreatBritain, and a resident of 160 Rue Faidherbe, La Madeleine-lez-Lille,Department of Nerd, France, have invented new and useful Improvements inStripping Apparatus for card ing Machines and the like (for whichapplications for patents have been made in France, May 5,1919, and GreatBritain, June 24, 1919), of which the following is a specification. I

This invention relates to a suction operated stripping apparatus forcarding machines and the like.

Arrangements of this kind have already been proposed in which a suctionnozzle moves continuously forward in front of. the casing of the cardingcylinder and parallel to a generatrix of the cylinder. This arrangementpresents the disadvantages of creating an interruption of continuity invthe sliver and of therefore preventing the ]atter from keeping itselfadequately supplied with they raw material, in particular at the ends ofthecasing.

The stripping device forming the subject of the present inventionenables these disadvantages to be avoided; it consists essentially in astripping tube placed as close as posslble to the casing of the cardingcylin der, this tube being provided with a longitudina]. suction slitwhich extends over the whole width of the casing, and the slit beinguncovered by means of a suitable device at sections located at a certaindistance apart, so that the stripping takes place at sectors which arenot adjacent but separated a suitable distance in such a WELY that theevenness of the sliver is completely ensured more especially at the endsof the casing.

For this purpose the stripping tube comprises an inner tube fittingfreely therein, and receiving a rotary motion from the countershaft ofthe carding machine; this inner tube is provided along its generatriceswith slits of short length and of width equal to that of the slit in thestripping tube. These slits in the inner tube are staggered in relationto one another, forming a kind of helix or winding upon the tube,

in such a way that those which are located in line upon the samegeneratrix of the tube, that is to say those which uncover the slitinthe strippin tube at the same time, are located at a suitably chosendistance apart.

Specification of Letters Patent.

Patented Aug. 1, 1922.

Serial No. 379,612. I

At the ends the slits are shorter so as to ensure the continuity of theSliver at this part, where it is propelled only on one side by thematerial contained in the casing and not yet stripped, since there is nomaterial beyond the extremities.

in addition, there is provided a starting and stopping device controlledby the countershaft of the carding machine, which allows the strippingoperation to be rendered completely automatic and dispenses with anyintervention of an operative.

ne example of'carrying out the subject of the invention isrepresented onthe anneXed drawing, in which y Figure 1 shows a longitudinal section ofthe suction tube of the stripping device.

Figure 2 is a longitudinal section of the inner tube. V I

Figure 3 is a diagrammatic cross section of the inner tube showing thedistribution of the slits, the section being taken irregularly throughthe latter.

Figure 4 is an axial section of a larger scale of the suction-tube andthe inner tube.

Figure 5 is an elevation of the controlling device for the strippingapparatus. I

Figure 6 is a diagram representing a carding machine provided with thestripping apparatus in accordance with the present invention. i v

Upon the frame a of the carding ma chine is fixed the suction-tube F) ofthe stripping device located as close as possible to the casing of thecardingcylinder 0 (see Figure 6). This tube is provided on the sidefacing the casing with a longitudinal slit 6 (see particularly Figurel), which covers the whole width of the casing of the cylinder. lVithinthis tube there revolves freely a second tube d (Figures 2, 3 and at) yprovided with a series of-rectangular slits al the width of whichcorresponds to the slit 6 in the tube 6. These slits are arranged alonga certain number of generatrices of the tube and form a kind of coil asI I longer, because the fresh material filling up fore the stripping ofany adjacent sector is effected. I r I in order that the ends of thecasings may retain with certainty the continuity of the sliver after thestripping, the slits d in the inner tube are ofv different lengths,being shorter towards the ends than in the center, as seen in Figure 2.a In these condi'- tions, the material existinglin the casing adjacentto the sector which has just been stripped is suflicientv to propel thefresh material filling up the cleared sector; in this way the continuityof the sliver is maintained even at the extremities, although the latterare only propelled on one side. In the case of the slits located towardsthe middle of the casing, the slits may be the cleared sectorsispro'pelled on both sides by the" material filling the adjoininguncleared sectors.

The tube Z) connected by a suction pipe 6 tea collecting receptacleprovided with filters in communication with a' vacuum p p. I

The starting and automatic stopping of the device iseilected'automatically by the controlling means represented in Figure 5.

The countershaft e of the carding machine, which regulates the supply ofraw material, controls'by the skew gears c 6 andthe gear wheels cfl'e?an endless screw f, having a double thread, one right-hand f and oneleft hand P, which is journaled in supports f secured upon the framea ofthe carding machine.

Upon the double-threaded screw 1 there is displacea'blefa collar 9having a toggle which engages the threads; thiscollar is prevented fromturning by a guide 9 provided in'gi oupslat suitable distances apart;these teeth mesh with a' pinion Z which rotates the innertuh'e (Z,andthe distance between the teeth is chosen insuch away that the interval of time between the meshing of two su'ccessi've group's otteeth withthe pinion. lot the inher tube Z be sufi'icient to allow the. cleared"sectors to become refilled with rawmaterial betore' the clearing of theother sectors talres plac'e lVhen the collar 9 has completed onerevolution, that is to say after all the teeth have been in contact withthe pi'nioiji Z 'ot thej inner tube, descends agamand'the movable disc7b falls downto its original position; the inner tube (Z ceases torevolveafterhavingmade one complete revolution for the clearing of thecarding machine. There is thus obtained in this way an intermittentcontrol of the stripping device which is completely automatic. n

In order to be able to' vary, according to thequality of the rawmaterial, the space of time between two successive strippings there maybe arranged a stop 'pieceregulating the up and down movement of thecollar'u'pon the double-threaded screw.

It" will be understood that the invention is not limited to the form ofconstruction which} has been described and given by'way of ex.- ample;thus the provision of an inner" tube for uncovering theslit in thestripping tube by sectors might be replaced by any other arrangementallowing. the suction and therefore the clearing'to be effectedintermittently as regards the non-adjacent sectors of the casingof "thecarding cylinder. In thesame way the controlling device, for'starti'ngand stoppping the stripper, might be replace-d ty any other si'iitabl'earrangement for the same purposez This method of stripping which isapple cable'with advantageto all textile machines, presents moreover inaddition to those al ready pointed out, the advantage of allowing thegrinding and adjustment of the cards without requiring them to be takendown;

The sainestripping arrangement may be H applied to the d-hfiing'cylinder, its operation f I bein effected thes'ame controlling device hya lowing the stripping" of'the dofter to take place at half-time inrelation to the stripping of thecylinder. 1

Having particularly described and ascertained the nature of my saidinvention and in what manner the. same is to be performed I declare thatwhatl' claim is i-' l. A suction operated card-stripping or cleaningdevice, comprising a strippingtuh'e adapted to be arranged against'the'casing of a carding cylinder, and having a longitudi nal slit extendingoverthe wh'ole width of the casing, and distributingmeans forp'enmitting theexertion of the suction efiort through said slit'only atpredetermin'ed laterally spaced areas. at successive time inter vals sothatthe stripping ofthe cardis" ef fected at nonadjoining -areas, andthe evenness of the sliver thus maintained. I

i 2. The construction specified inclaimfl, comprising as itsdistributing means a tube "freely revoluble within thestripping tube andprovided along a ertain number of its gener'atrices with shortslitsadapted to register' with the slit in the stripping tube and 12Bstaggered in 'r'elation to each other so asv to form a kind of spiral'upon the inner tube.

3.'The construction specified'in claim 1, U comprising its distributingmeans a tube rotating within thestripping tube and being provided withslits of unequal length, being shorter towards the extremities thantowards the middle of the tube, in order that at the former positionsthe sliver may be propelled with certainty by the raw material existingin the adjacent area not yet cleared.

1-. The combination with the suction stripping device specified in claim1, of an automatic sto Jin and startin means therefor m a a comprisingclutching and declutching mechanism, and means driven by the cardingmachine for operating said clutch periodically to ell'ect the operationof the distributing means automatically at regular and suitably chosenintervals of time, according to the qualities of the raw material.

5. The combination with the suction stripping device specified in claim1, of automatic starting and stopping means therefor, comprising aclutching and declutching mechanism for controlling the operation of thedistributing means, a clutch operating member, and an endlessdouble-threaded screw imparting a to and fro movement to said operatingmember, and means associated with the carding machine for rotating thesame,

In testimony whereof I have signed my name to this specification.

ALFRED SMITH.

Witnesses J ACQUES ARANENGARD, H. DEFEVRIMONT.

